CVE-2026-34069 (GCVE-0-2026-34069)

Vulnerability from cvelistv5 – Published: 2026-04-13 23:55 – Updated: 2026-04-14 16:28
VLAI
Title
nimiq-consensus panics via RequestMacroChain micro-block locator
Summary
nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. In versions 1.2.2 and below, an unauthenticated p2p peer can cause the RequestMacroChain message handler task to panic. Sending a RequestMacroChain message where the first locator hash on the victim’s main chain is a micro block hash (not a macro block hash) causes said panic. The RequestMacroChain::handle handler selects the locator based only on "is on main chain", then calls get_macro_blocks() and panics via .unwrap() when the selected hash is not a macro block (BlockchainError::BlockIsNotMacro). This issue has been fixed in version 1.3.0.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-14 15:35 UTC
CWE
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
nimiq core-rs-albatross Affected: < 1.3.0
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